After traveling through the Qin Dynasty and becoming the adopted son of Ying Zheng, Zhao Xuan endured for ten years, seized the loopholes in the main force of the Qin Dynasty, and led his army to raid Xianyang. The capital was in danger, and the civil and military forces of the entire dynasty were helpless. Wang Jian, the only pillar of support, deliberately avoided the battle. God-given opportunity, he took advantage of the situation and launched an army to attack Qin. He turned against the odds and replaced Ying Zheng to take charge of the Qin Dynasty.